Slack-adjuster.



PATENTED JULY 16, 1907.

Njo."860,239.

Y A. PARKER-SMITH.

SLACK ADJUSTER.

APPLICATION FILED NOV. 21,1806.

wuowtoz l P UNITED STATES PATENT OFFICE.

AUGUSTUS PARKER-SMITH, OF NEW YORK, N. Y., ASSIGNOR TO ATLAS SLACKADJUSTER COMPANY, A CORPORATION OF NEW YORK.

SLACK-ADJUSTER.

No, 860,239. I Specification of Letters Patent. Patented July 16, 1907.Application filed November 21, 1906. Serial No. 344.432.

To all whom it may concern: In operation the take-up clutch comprisingthe Be it known that I, AUGUSTUS PARKER-SMITH, a stiirup 12 will movewith the top red 6, until excess citizen of the United States ofAmerica, and a resident travel of piston rod 2 occurs. Then portion 16of the of the borough of Manhattan, city, county, and State stirrupextension will strike stop 21, and shove clutch 5 of New York, haveinvented certain new and useful dog 13 to the right along top red 6. Onrelease 01" Improvements in Slack-Adjusters, of which the folbrakes stop21 will strike portion 18 of the stirrup lowing is a specification.extension and clutch dog 13 will hold top rod 6 while My inventionrelates to mechanism for automatic clutch dog 9 is shoved to the rightalong the top red a ally adjusting the brake rigging on a railway or otcorresponding distance. This will take up the slack. 10 car sothatuniform maximum travel of the piston will By varying the length ofportion 17 of the stirrup extenbe preserved as the brake shoes weardown. sion, or the thickness of stop 21, the permissible piston The bestform of apparatus at present known to me t avel may be varied. embodyingmy invention is shown in the accompany- The advantages of my inventioncomprise its case ing drawing in which of attachment to existingapparatus, cheapness and l 5 Figure 1 is a plan view of a portion of theusual brake simplicity and accuracy of action.

rigging with my invention appl ed he n F g- Other forms of grippingdevices might be substi- 2 is a side elevation of the same with partsbro iW- tuted for the friction clutches shown and other forms Throughoutthe drawings like figures ind like of lost motion connection used, but Ibelieve those parts. illustrated to be the best adapted to the work. 201 IS the compressed air cylinder, 2 the piston, 3 the Having, therefore,described my invention, I claim: g hand brake ev 4 the left hand brake5 1. In a slack adjusting device for railway brakes the the tie IOdfGthe right hand top rod and 7 the left hand combination with the usualbrake levers and top rods of an top Tod all of usual Construction exceptthat top rod adjustable gripping device pivoted to one brake levcr and 6is not pivoted direct to brake lever 3 but Passes grasping thecorresponding top red and a second ad ustable gripping device alsograsping said top red and having 25 through h clutch stlmlp 8 as shown1n g- The a lost motion connection with the other top red.

stirrup 8 is pivoted 130 the brake lever and contains the In a slackadjusting device for railway brakes the perforated clutch dog 9,engaging top rod 6, fulcrumed combination with the usual brake levers,and top rods, 01

i a friction clutch pivoted to one brake lever and grasping on thebeveled" corner 10 of the stlnup and held In the corresponding top redand a second take-up friction Operative Po by Spring The inner end ofclutch also grasping the said top rod and having a lost 30 rod 6 isgrasped by a second, adjustable 611113011 01 other motion connectionwith the other top red. i i device preferably composed of the stirrup 123. In a slack adjusting device for railway brakes the x I combinationwith the usual brake levers and top rods, of dutch dog and spring Anextenslon 15 of thls a stirrup pivoted to one brake lever perforated forthe passtirrup has any suitable 1051; motion connection with sage of atop red and provided with a clutch dog engaging the other top rod 7,either dn'ectly 01' through any C011- said rod and a second similarstirrup mounted on the S0 35 i t m h i A Shown7 thi 1 t ti inner end ofthe top red and having a bent extension, a rod engaging said bentextension and pivoted to the other nectloil conslsts Of,the bentpoltlons l7 and 18 O brake lever, and a projection on said rod limitingthe the Stmup extenslon the Supplementary 10d 19 movement over it of thestirrup extension.

pivoted to the other p rod and to the brake lever Signed at New York, N.Y., this 19th day of November, 4 by the common pin 20. The portions 16and 18 of 1906. 40 the stirrup extension are perforated to permit thepas- PARKERSLUTIL sage of the rod 19 and the projection 21, which is anut witnesses or ring riveted to the rod 19, is located between theMANUEL c, L EZ,

two perforated portions of the stirrup extension. M C wrono.

